<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
    <head>
        <title>MathML invalid 001</title>
        <meta charset="UTF-8" />
    </head>
    <body>
        <h1>MathML invalid 001</h1>
        <section>
            <h2>Content MathML at block level</h2>
            <p>...</p>
            <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="formula">
                <apply>
                    <csymbol cd="arith1">times</csymbol>
                    <apply>
                        <csymbol cd="arith1">plus</csymbol>
                        <ci>F</ci>
                        <ci>G</ci>
                    </apply>
                    <ci>x</ci>
                </apply>
            </math>
            <p>...</p>
        </section>
        <section>
            <h2>Content MathML at phrasing level</h2>
            <p>... <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="formula">
                    <cn type="complex-polar"> 2 <sep/> 3.1415 </cn>
                </math> ... </p>
        </section>
    </body>
</html>
